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<blockquote data-quote="gone_fishing" data-source="post: 93379" data-attributes="member: 708"><p>Each battery is a bank so if you have a 36 volt trolling motors (3 batteries) you would need at least a 3 bank charger. If you also wanted to charge you starting battery you would need a 4 bank charger. Some don't have a charger on the starting battery and rely on their motor to produce enough amps to keep it topped off. If you don't run your outboard for extended periods of time and/or don't have a strong alternator (older outboards especially) it might not be enough depending on how much is running of the main starting battery. I have a 3 bank charger but only a 24v trolling motor so all 3 batteries are hooked up to a charger. It's just nice to know the starting battery is topped off and ready to go after a day of running graphs, radio, live well pumps, etc. Personally if I had a 4 battery setup (3 trolling and 1 starting) I would have a 4 bank charger. Even the 5 amps per bank should have no problem completely charging batteries overnight.</p></blockquote><p></p>

[QUOTE="gone_fishing, post: 93379, member: 708"] Each battery is a bank so if you have a 36 volt trolling motors (3 batteries) you would need at least a 3 bank charger. If you also wanted to charge you starting battery you would need a 4 bank charger. Some don't have a charger on the starting battery and rely on their motor to produce enough amps to keep it topped off. If you don't run your outboard for extended periods of time and/or don't have a strong alternator (older outboards especially) it might not be enough depending on how much is running of the main starting battery. I have a 3 bank charger but only a 24v trolling motor so all 3 batteries are hooked up to a charger. It's just nice to know the starting battery is topped off and ready to go after a day of running graphs, radio, live well pumps, etc. Personally if I had a 4 battery setup (3 trolling and 1 starting) I would have a 4 bank charger. Even the 5 amps per bank should have no problem completely charging batteries overnight. [/QUOTE]

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